Installing the piston and cover
Apply a little petroleum jelly to the O-ring for the piston and the sealing ring for the cover.
Use Volvo Genuine parts petroleum jelly (P/N 116 51-4).
Reinstall the piston in the transmission.
Angle the cover over the piston. Slide the cover towards the transmission.
Tighten the screws alternately. Tighten to 10 Nm .
Install the wiring on the stud.